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FRONT PANEL CONTOLS
1. CH1/CH2 MIC/LINE INPUT: Combi sockets provide the flexibility to connect either a
balanced XLR or unbalanced jack terminated cable. Set Level control (2) to minimum before
connecting a device to the Mic/Line inputs. For best results, always use a good quality
instrument/mic cable.
Phantom Power (15V non switchable) is available from the XLR Inputs only. This is
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for use with condenser microphones, but dynamic mics won't be damaged if used.
Please note that some 48V condenser Mics may not work.
2. LEVEL/PEAK: Use together to find the optimum level for your signal. Adjust the Level so
the Peak only lights during the very highest peaks of the connected signal.
Peak illuminates constantly = possible distortion. Damage won't occur to the
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amplifier, but audio quality may suffer.
Peak is never illuminated = slightly reduced signal to noise ratio as amplifier is not
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running at optimum levels.
3. SHAPE: Engages an EQ circuit to give a brighter, more extended top end and scooped mid
to provide more definition.
4. EQ: A traditional set of tone controls giving the player a natural set of tools to shape their
ideal sound. As a starting point, set the EQ controls to the 0 position.
5. CHORUS: To engage the Chorus press the Chorus switch. The adjacent LED lights only
when the effect is active. To adjust the chorus amount, press and hold the Chorus switch (while
the chorus is active) and adjust using the Reverb control. Once you release the Chorus switch,
the LED will briefly flash to indicate the setting has been stored.
The amplifier is shipped with a Chorus level of 3.
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6. REVERB LEVEL: Use these to independently control the reverb/chorus for channels 1 and
2. The Reverb Level increases progressively as you move the control from 0 to 10.
Also controls Chorus Level (when the Chorus button is pushed down).
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Amp
7. ANTI-FEEDBACK: When the Anti-Feedback control is enabled the A-FRESCO actively
and automatically searches for any signs of feedback (over multiple frequencies) and greatly
reduces the possibility of it before becoming a serious problem.
It is recommended that Anti-Feedback is enabled if acoustic guitars or microphones
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are connected.
8.
PHASE:
Switches the phase of the signal from the amplifier. When you play any acoustic
guitar the sound it produces is a waveform, the same applies to an acoustic guitar plugged into an
acoustic amplifier. It is not uncommon for these two waveforms to be out of phase with each
other. To a player sat close to an amplifier this poses a small problem if the wave forms are out
of phase as they are destructive to each other and cancel each other out. This would cause the
guitar to sound a little thin and lack-lustre. Engaging the phase switch switches the phase of the
amplified signal removing the problem of destructive interference. However sometimes the low
frequencies being in phase can cause acoustic feed back problems, to avoid this try operating the
phase reversal switch. Most times this will cure the problem. One thing to point out is that the
audience does not hear any phase problems as by the time the sound wave reaches them any
phase differences have been cancelled out naturally.
9. VOLUME: To control the overall output level from Phones, FX Send and Speakers.
10. MUTE: This will mute Inputs 1 and 2, but not signals connected to AUX IN or FX
RETURN.
The Power Led will flash when the Mute is enabled.
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11. POWER: Illuminates when the Power Switch is set to on.
Audio feedback is caused when a loop occurs between a
microphone or guitar pickup and the loudspeaker. Commonly
caused by pointing a microphone at a speaker or simply by the
two being too close. The result is an unpleasant screeching or
whistling sound. The A-FRESCO is equipped to deal with this.
EN
A-FRESCO
VOLUME
MUTE
POWER
0
10
ANTI-FEEDBACK PHASE
REVERB
0
10
0
10
CHR ADJ
CHR ADJ
CHORUS
CHORUS
0
0
TREBLE
0
0
MIDDLE
0
0
BASS
SHAPE
SHAPE
LEVEL
0
10
0
10
PEAK
CH1
CH2
VOLUME
MUTE
POWER
0
10
ANTI-FEEDBACK PHASE
REVERB
0
10
0
10
CHR ADJ
CHR ADJ
CHORUS
CHORUS
0
0
TREBLE
0
0
MIDDLE
0
0
BASS
SHAPE
SHAPE
LEVEL
0
10
0
10
PEAK
CH1
CH2
6
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